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प्रश्न
Write the formula of the following compound:
Copper [II] chloride
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उत्तर
Copper [II] chloride - CuCl2 - `"Cu"^(2+)["Cl"]^(1-)`
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संबंधित प्रश्न
State the chemical symbols for the following elements :
Sodium, Potassium, Iron, Copper, Mercury, Silver.
What do the following abbreviations stand for ?
- O
- 2O
- O2
- 3O2
Write down the formulae for the following compounds :
Magnesium hydroxide
An element Z has a valency of 3. What is the formula of oxide of Z ?
Give the formulae of the compounds formed from the following sets of elements :
- calcium and fluorine
- hydrogen and sulphur
- nitrogen and hydrogen
- carbon and chlorine
- sodium and oxygen
- carbon and oxygen
The formula of carbonate of a metal M is M2CO3.
What will be the formula of its phosphate ?
Give the empirical formula of Acitic Acid CH3COOH.
Name the element in the compound and give the formula of the following compound:
Carbonic acid
Name the element in the compound and give the formula of the following compound:
Ethane
Write the formula of the following compound:
Potassium bicarbonate
Write the formula of the following compound:
Sodium sulphite
Write the formula of the following compound:
Zinc chloride
Write the formula of the following compound:
Iron [II] sulphate
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
KNO3
Write the molecular formulae for the following compounds
Aluminium (III) nitrate
Write the molecular formulae for the following compounds
Calcium (II) phosphate
Write the molecular formulae for the following compounds
Magnesium (II) acetate
Give the chemical formulae for the following compounds and compute the ratio by mass of the combining elements in each one of them. (You may use appendix-III).
- Ammonia
- Carbon monoxide
- (Hydrogen chloride
- Aluminium fluoride
- Magnesium sulphide
Complete the following crossword puzzle (Fig. 3.1) by using the name of the chemical elements. Use the data given in Table.
| Across | Down | ||
| 2 | The element used by Rutherford during his α–scattering experiment | 1 | A white lustrous metal used for making ornaments and which tends to get tarnished black in the presence of moist air |
| 3 | An element which forms rust on exposure to moist air | 4 | Both brass and bronze are alloys of the element |
| 5 | A very reactive non–metal stored under water | 6 | The metal which exists in the liquid state at room temperature |
| 6 | Zinc metal when treated with dilute hydrochloric acid produces a gas of this element which when tested with burning splinter produces a pop sound. | 8 | An element with symbol Pb |
Play a game for writing formula.
Example 2: A low-cost model for writing formulae: Take empty blister packs of medicines. Cut them in groups according to the valency of the element, as shown in the figure. Now, you can make formulae by fixing one type of ion into other.
For example:
The formula for sodium sulphate:
2 sodium ions can be fixed on one sulphate ion.
Hence, the formula will be Na2SO4.
Do it yourself:
Now, write the formula of sodium phosphate.
